A potent but lightweight formula that can fill porosity, hydrate, and strengthen hair from the inside out for healthier hair that keeps its brilliant color. reaches the hair's core to produce 86% stronger strands. * Hair is 86% more hydrated* and has less porosity to help retain color longer in the shower, protecting it from the stripping effects of hard water. Hair so healthy that 92% of the color intensity is retained after 6 weeks** Guidelines for Use Apply a hazelnut-sized amount to the mid-lengths and ends of towel-dried, cleansed hair, being careful not to reach the roots for a lightweight volume. To improve penetration, massage. Give it a couple of minutes. After emulsifying, completely rinse. Components AMINO ACID: This potent acid is a component of hair fiber.